Detachable Driving Piston Set for Reusable Injector Mechanism
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Solution Overview
Problem
Conventional injectors for subcutaneous pharmaceutical agent administration face issues of waste due to fixed structures that cannot be reused and safety concerns from the driving mechanism coming into contact with the pharmaceutical agent, leading to unnecessary disposal.
Innovation Solution
A driving piston set and conversion mechanism that allows the driving piston set to be detachably connected to the driving mechanism, enabling the medicament to be conveyed through a needle set for injection without the driving mechanism contacting the pharmaceutical agent, thus enabling reuse and reducing waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving mechanism is directly connected to the injection module and comes into contact with the pharmaceutical agent, then the injection function is achieved, but the driving mechanism cannot be reused due to safety and hygiene reasons
Solution Approach 1:
The injection device is divided into separate modules: a reusable driving mechanism and a disposable injection module. The driving piston set includes a piston cylinder, valve, and piston rod that can be detached from the driving mechanism after use, allowing the driving mechanism to be reused while the injection module is discarded for safety and hygiene reasons.
Solution Approach 2:
The injection module containing the piston cylinder, valve, and piston rod is extracted as a separate disposable component from the reusable driving mechanism. This extraction allows the driving mechanism to be separated and reused, while the injection module that contacts the pharmaceutical agent is discarded after limited use.
2Reliability
If the entire set of the conventional injector is discarded after limited reuse, then safety and hygiene requirements are met, but unnecessary waste is generated
Solution Approach 1:
The injector is segmented into reusable and disposable parts. The driving mechanism (motor, transmission components) is reusable, while only the injection module (piston cylinder, valve, piston rod, needle assembly) is disposable. This segmentation reduces waste by allowing the majority of the device to be reused.
Solution Approach 2:
The disposable injection module is discarded after limited use to maintain safety and hygiene, while the reusable driving mechanism is recovered and can be used again. This selective discarding and recovering approach minimizes waste while meeting safety requirements.
3Reliability
If the combination structure of the conventional injector is fixed, then the injection function is reliable, but the device cannot be adapted for different uses and must be discarded entirely
Solution Approach 1:
The fixed combination structure is changed to a dynamic, detachable connection between the driving mechanism and injection module. The piston rod is detachably connected to the driving mechanism through a driving unit, allowing the system to be configured for use and then separated for reuse of the driving mechanism.
Solution Approach 2:
The reusable driving mechanism can be paired with different disposable injection modules for different pharmaceutical agents and injection types, making the driving mechanism universal and adaptable for multiple uses while maintaining reliable injection function through the specialized disposable modules.
Data Source
AI summary
A conversion mechanism includes a driving piston set and a conversion connecting base. A piston cylinder of the driving piston set is connected to a medicament container containing medicament and a needle output mechanism having needle set through an input one-way valve and an output one-way valve of a valve. A piston rod mounted in the piston cylinder is detachably connected to and driven by a driving mechanism, such that the conversion mechanism in combination with the needle output mechanism forms an injection module. The medicament container and the injection module relating to safety and hygiene in the injector can be used once and be disassembled and discarded after user. With the driving mechanism externally connected to the conversion mechanism, the driving mechanism does not come into contact with the medicament during injection.